In interviews for PLSQL developers, I usually ask a question of the form:
If you write a procedure to do <specific operation>, what will be the signature of such a procedure?
In response, the developer often veers off into describing the logic/body of the procedure, which is not what was asked.
If you’re among those likely to answer that question similarly, this article will clarify for you the concept of "signature" of a PLSQL stored procedure.